Packing and the method of making the same.



W. C. BUHLES.

PACKING AND THE ME OF MAKING THE SAME.

APPLICATION IL APR. 28. I915.

' .l,1@ .,0 6. Patentd N0v. 30, 1915.

Eli-

WITNESSES: IN VEN TOR.

WM. CBUHLE'S MYG/Wj' ATTORNEYS.

Tl PATENT OFFIfl WILLIAM C. BUHLES, OF ALA'HIEDA, CALIFORNIA, ASSIGNOR T0 ALUMINUM SEA COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

To all whom it may concern:

Be it known that I, WILLIAM 0. Bonnie, a citizen of the United States, and a resident of Alameda, county of Alameda, and State of California, have invented a new and useful Packing and the Method of Making the Same, of which the following advantageous features, some of which, with the foregoing, will be set forth at length in the following description, where I shall outline in full that form of the invention and I .the method of manufacture, which I have selected for illustration in the drawings accompanying and forming part of the present specificatiom In the drawings I have shown only one specific form of my invention, but it is to be understood that I do not limit myself to such form, because my invention may be embodied in a multiplicity of forms, each being a species of my said invention. It is also to be understood that by the claims succeeding the description, I desire to cover the invention in whatever form it may beembodied. v v

In the drawings I have shown one form of the packing and the apparatus used for making it.

Figures 1, 2 and 3 show portions of the dies and three successive stages of the operation of forming a packing disk! Fig. 4 is a plan, view of a pacln'ng disk of my invention. Fig. 5 is a section of the packing disk taken on the line A- A Fig. 4.

I have shown the invention herein as emin caps or closures for receptacles to seal the joint between the upper edge of the receptacle and the cap. The body of the packing so used consists generally of a disk of Specificationof Letters Patent.

riphery PACKING AND THE METHOD OF MAKING THE SAME.

Patented Nov. 30, 1915.

Application filed April as, 1915. Serial No. 24,558.

material capable of being pressed into conformance with the mouth of the bottle or receptacle, and is usually composed of fibrous material such as cork or paper. The packing is provided on its lower surface, or that surface which contacts with the bottle,

witha thin sheet of impervious waterproof material, to prevent the liquid from soaking into and through the fibrous disk and to prevent the passage of air or gas into or out of the receptacle through the somewhat porous fibrous material. In accordance with my invention the sheet of impervious material is pressed or stamped into locking engagement with the fibrous sheet, producing a new packing, and the locking of the two sheets is preferably performed in the same operation with the cutting of the disk or other shaped packing from sheets of material. This operation is preferably performed by means of a-die and I shall describe a die capable of performing the operation of making packing disks in accordance with my invention. The sheet 2 of fibrous material with an overlying sheet 3 of this impervious material, such as waterproof paper, is placed on the female die l,

which, when a disk is to be cut, is annular in shape. Arranged above the female die .7 of the projections are flush with the side A of the die and the under surfaces 8 are inclined upward from the lower edge of the projection to the body of the die. The side faces of each projection preferably digress from each other outwardly, so that they form an outwardly flaring or dove-tailed cut. The lower face of the die at the peis preferably sloped upward sli htly between the projections.

s the male die is brought down on the superposed sheets, a plurality ofcircumferentially disposed dove-tailed tongues 12 are cut in the sheet 3 of imperviousmaterial, and pressed into flaring depressions formed in the fibrous sheet 2, and then the further movement of the die cuts the disk I3 from the sheets. The disk is formed of a relatively thick layer of fibrous or con formable material and a. superposed layer of thin impervious material having a plurality of circumferentially disposed tongues pressed into depressions 14 in the thick layer. Byforming the tongues dove-tailed in shape, the thin impervious layer is locked to the thick fibrous layer. against radial displacement and by pressing tongues of the thin layer into the thick layer and parts, are held together against axial displacement. I, therefore,pro'vide a packing disk having an impervious surface and cut the disk from the sheet and attach the two layers in one operation and without the use of any adhesive.

I claim:

1. An article of manufacture, comprising a piece of fibrous material and a piece of impervious material in interlocked engagement whereby said pieces are held together.

2. An articlev of manufacture; comprising a piece of fibrous material, and a piece of impervious material having a plurality of tongues seated in depressions in thefibrous' material.

3. An article of manufacture, comprising a d1sk of conformable material having a plurality of circumferentially disposed depressions therein and a disk of impervious material having a plurality of circumferentlally disposed tongues seated in said depressions.

4. An article of manufacture, comprising a disk of fibrous material having a plurality of circumferentially disposed outwardly flaring depressions therein and a disk of thin impervious material having a plurality of circumferentially disposed outwardly flaring tongues seated in said depressions.

5. An article of manufacture comprising a piece of relatively thick material and a superposed piece of relatively thin material interlocking therewith whereby said materials are held together.

6. The method of making the hereindescribed article of manufacture which consists in superposing two sheets of material and simultaneously cutting pieces from said sheets and pressing said engagement.

7. The method of making a packing disk which consists in superposing a sheet of impervious material on a sheet of fibrous material, cutting a plurality of circumferential tongues on said sheet of impervious material and pressing them into locked engagement with the sheet of fibrous material and cutting the locked disks from the sheets.

In testimony whereof, I have hereunto set my hand at San Francisco, California, this 22d day of April 1915.

WILLIAM C. BUHLES.

In presence of H. G. PROST.

pieces into locking 

